Gauge



Feb. 1938..

Filed MaICh 9, 1936 R. R. BOSTIC GAUGE 2 Sheets-Sheet l l IZ "FT E. E

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GAUGE A Filed March 9, 1936 2 Sheets-Sheet 2 Ti E. E

s a l INVENT OR.

R. RBOSTM. BY

Patented Feb. l, 1938 aleen iiTENT GFFICE 8 Claims.

' This invention relates to gauges.

The general object of my invention is to provide a novel gauge which is accurate, easy to operate, and economical to manufacture and which will measure a wide variety of dimensions.

A more specific object is to provide a dial gauge in which novel motion amplifying mechanism is employed.

Further objects and advantages of my invention will be apparent from the following description taken in connection with the accompanying drawings, wherein:

Fig. l is a top plan view of my improved gauge;

Fig. 2 is acentral section taken on line 2--2 of Fig. 1;

Fig. 3 is a fragmentary section taken on line .3 3 of Fig. 2 showing the construction of the Jaws;

Fig. 4 is an enlarged fragmentary plan view 2O showing details of the jaws;

Fig. 5 is a fragmentary detail of the jaws showing the inside measuring pins;

Fig. 6 is a section taken on line 6 6 of Fig. 2 showing my improved motion amplifying apparatus;

l Fig. 7 isa plan view of the dials which I employ in my improved gauge;

Fig. 8 is a fragmentary elevation partly in section showing the wire securing device;

Fig. 9 is `a fragmentary detail partly in section showing the manner in which the jaw pins engage arecessed article; and

Fig. 10 is a section on line III- Ill of Fig. 6.

Referring to the drawings by reference characters I have shown my invention as embodied in a gauge which is indicated generally at Ill. As shown the gauge lil includes a housing I2 which may be made of any suitable material and in any manner. As shown the housing is made of wood and has a` topplate I3 suitably secured in recesses I4 therein. The plate I3 includes an upper plane portion I5 which is bent at an angle to the remainder of the plate which is also plane.

The plate I3 is slotted as at I5 and beneath the plate and beyond each end of this slot and transverse to the direction thereof I secure a pair of angle brackets Il. (See Fig. 3.) A pair of ways consisting of parallel rods I3 extend be- 50 tween the brackets and are secured thereto as by screws I9. On each of the rods I8 a tubular slide 26 is positioned. The slides 29 are secured in spaced apertures 2i in a yoke member shown at 22, and which includes a forked arm 23. The

n|55 yoke is slotted as at 24 and screws 24. extend across the slot to lock the slides in position. (See Fig. 6.)

Positioned above the slot IB and adapted to. move longitudinally thereof I provide a movable gauge jaw 23 having a grip knob 43 at one end '-5 and having a depending lug 21 thereon which extends through the slot It and is secured tothe yoke 22 by a screw 28. The lug is of such length that the jaw 26 is above the plate I3 a slight distance. 1.10

A fixed jaw 29 is secured by screws 3U to the plate I3 adjacent one end of the slot I6. The jaws 25 and 30 are preferably made a-s a one piece casting or forging and are identical except for the manner in which they are mounted l5 and each includes a hardened face plate 3| which is secured to the jaw by screws 32. Each of the plates 3l has a hook member 33 shown as secured thereto although it maybe of one piece with the plate or body. (See Fig. 4.) 'Ihe ends '120 of the hook members 33 are in the same plane as the face of the associated plate 3i and these hook members 33 are adapted to be used as shown in Fig. 9 where a piece of material of I-shape is being gauged to determine the thickness of the `2E web.

An arm 34 is secured in a recess in the upper face of the jaws 2E and 29 by screws 35. Each arm 34 includes an upstanding hardened finger 3B the inner faces 3l of which are a fixed dis- 30 tance beyond the face of the plate 3|. Assuming that in the embodiment of my invention here shown this fixed distance is one and one half inches it will be seen that when the plates 3l are a given distance apart, the faces 3'I are the given 35 distance plus three inches apart. Thus I am enabled with a three inch jaw movement to provide a measuring range of six inches.

To provide for making internal measurements I secure a plate 38 tothe end of each plate 3l 40 as by screws 39 and pins si). The plates 33 each include an offset finger 4I and one of the plates 38 is also offset laterally from the other plate 38 to provide proper clearance. (See Fig. 4.)

A dust shield @d may be secured to the plate I3 45 as by screws and extends downwardly and forwardly to engage the bottom of the housing. The shield It is slotted as at IIS to .allow the yoke 23 to pass therethrough.

A dial post III arranged below the plate I3 50 has a press fit in a mounting member 48 which is held in place by a screw 49. A collar 5I! rotatably mounted on the post 4l is engaged by a washer 5I which is held in place by nuts '52 on a reduced threaded portion 53 of the post 41. 55

Vin place. 'passes about the ring 51 a number of times and The collar 50 is secured to a dial plate 54 which includes an upraised peripheral portion on which a scale 56 is inscribed. (See Fig. 7.)

A ring member 51 is rotatively secured about the collar 5D below a circumferential flange 56 on the collar 56 and above a washer 59. A dial plate 60 is secured tothe ring 51 and has a scale 6| inscribed adjacent the periphery thereof.

The yoke 23 includes a pair of arms 62 which have a pair of aligned threaded apertures 63 therein to receive threaded anchor members 64V to which are secured the ends of flexible member shown as Wires 65 and 66, although I may use other flexible members such as small chains, should I so desire. The anchors 64 are provided with suitable lock nuts 61. are secured to the anchors 84 as by welding as in icated at 51. (See Fig. 10.)

The ilexible member 65 passes about the collar 50 a plurality of times and is secured in a slot `68 therein-by a pin 68 which is'retained in place by a lead'plug 10. Instead of using the pin and plug I may weld or solder the flexible member (See Fig. 8.) The flexible member 66 is secured in a slot 1| .therein in the same manner as the flexible member 65 is secured to the collar 50.

The diameters of the collar 5@ and the ring 51 in the device shown are such that the dial 55 rotates through threeY timesV the angle which the dial 60 rotates. As shown in Fig. '7 the scale 56 is calibrated in thousandths reading from 0 toV 1000. The scale 6I is calibrated infractions readingV from 1 to 3 inches. The face of the plate I3 is calibrated with a scale 12 calibrated from 0 to 3 inches to indicate the approximate Vdistance between the plates 3l, and with aV scale 13 calibrated from 3 to 6 inches to indicate the approximate distance between the fingers 35;

A cylindrical lens 14 is mounted in abezel 15 mounted in the portion l5 of the plate I3 above the scales 56 and 6|. Across hair 15 is positionedacross the lens 14 to provide an index against which the scales 56 and 6l may be read.

In using the gauge the object to be measured is placed between the plates Si ,or (the hooks 33, or about the fingers lll and the jaw 25 is moved until the object is firmly engaged by the gauge members, The scales appearingthrough the lens 14 thengive the reading of the distance in fractions and decimals and the scale 12 gives the reading in inches. When a larger object is to be measured it is placed between the lingers 36k In order to preventV undue shock when the.

jaws are moved abruptly, I may provide a'dashpot construction indicated generally at 80.

As shown the angle brackets l1 each include a projecting portion l1 provided-with opposed apertures throughrwhich a tube 8i is inserted.

The external surface of this tube at each end is threaded 'and receives a threaded collar 82 at each end which is in engagement with the inner face of the brackets while a nut 83 engages the outer face of the brackets to hold the parts assembled. Each end of the tube is provided with a plug 84 suitably held in position and provided with a central aperture 85 and with lateral apertures 86. A plunger 81 is mounted to slide in the Y tube and this plunger is provided with a stem 88 Ywhich passes through a slot 89 in the tube and hasV an upper threaded end 90 which is inserted The'wires 65 and 66 is simple in construction and highly eliicie'nt in use. Y a. Y i.

VHaving thus described my invention I claim: a l, A gauge including a base plate, a iixed jaw Ymounted on said base plate, a slot in said plate,

a` pair of angle members secured below said plate at the ends of said slot and extending transverse to said slot, a pairof cylindrical slide members extending between said angle members below andparallel to said slot, a slider on each of said slides, a yoke connecting said sliders, a pair ofA arms on said yoke, a cylindrical post extending below said plate, a collar rotatively mounted on said post, a ring rotativelymounted on ksaid collar, a dial secured to said collar, a second dial secured to said ring, a pair of flexible` members secured to and extending between said arms, a plurality Yof loops in one of said flexible members engaging said collar, a plurality of loops in the otherY of said flexible members engaging said ringand a second jaw positioned above said plate, said second jaw member having a portion thereof extending through said slot and secured to said yoke.

2. A gauge including a base plate, a housing supporting said base plate, a fixed jaw mounted on said base plate, a slot inrsaid plate, a pair of angle membersA secured below said plate within said housing transverse toV and at the 'ends of said slot, a pair'of cylindrical slide members ex- L tending between said angle members below and parallel to said slot, a slider on each of said slides, a yoke connecting said sliders, a pair of arms on said yoke, a cylindrical post mounted on and extending below said plate within said housf ing, -a collar-rotatively mounted on said post, a dial secured to said collar, a flexible member extending between said arms,va pluralityv of loops 'in said flexible member engaging said collar, .means to secure a portion of one of said loops to said collar, and a second jaw positioned above said plate and having a portion thereof extending through said slot and secured to-said yoke.

3., A gauge including a base plate, a housingVV supporting said base plate, a xed jaw mounted on said base plate, a slot in said plate, a pair of angle members secured `below said plate within said housing transverse to and at the ends of said slot, a pair of cylindrical slide members extending between said angle members below and parallel to said slot, a slider on each of said slides, a yoke connecting. said sliders, a pair of arms on said yoke, a cylindrical post mounted on and extending below said plate within said housing, a collar rotatively mounted on said post, a ring rotatively mounted on said collar, a dial secured to said collar, a dial secured to said ring, a pair` of iiexible members extending between said arms, j

a plurality of loops in one of said flexible members engaging said collar, meansV to secure a portion of one of said loops to said collar, a plurality of loops in the other of said flexible members engaging said ring, means to secure a portion of one of said second loops to said ring, the diameter l01 Said rst loops having an elemental ratio to the 75 diameter of said second loops, and a second jaw positioned above said plate and having a portion thereof extending through said slot and secured to said yoke.

4. In a gauge, a housing, a top plate on said housing, said top plate including an inclined lower portion and an inclined upper portion, said upper portion being more steeply inclined than said lower portion, said plate having a slot therein, a

pair of ways beneath said plate and parallel to said slot, a slider member mounted on said ways, a jaw member fixed relative to said plate, a second jaw member having a portion thereof eX- tending through said slot and secured to said slider member, said slot being disposed in said lower portion of said top, a dial mounted in said housing, and means whereby movement of said slider member rotates said dial, said upper portion of said top having an aperture therein, saidl dial being disposed parallel to said upper portion of the top, the dial having indicia thereon readable through said aperture.

5. A gauge including a base plate, a housing supporting said base plate, a xed jaw mounted on said base plate, said plate having a slot, a pair of slide members mounted below and parallel to said slot, a yoke slidable on said members, a pair of arms on said yoke, a cylindrical post mounted on and extending below said plate within said housing, a pair of dials mounted to rotate on said post, a collar on each dial, a pair of flexible members extending between said arms and looped about said collars, the diameter of one of said collars having an elemental ratio to the diameter of the other collar, and a second jaw positioned above said plate and having a portion thereof 'ex tending through said slot and secured to said yoke.

6. A gauge including a support, an anvil xedly mounted on said support, a pair of spaced xed slide members mounted on said support, tubular slide members slidable on said slide members, a post mounted on said support, a pair of dials mounted to rotate on said post, a collar on each dial, a pair of spaced anchor members mounted on said tubular slide members and movable with the tubular slide members, a pair of iiexible members extending between said anchor members and looped about said collars, the diameter of one of said collars having an elemental ratio to the diameter of the other collar, a second anvil movable towards and from the first mentioned anvil and means whereby said second anvil is moved by said tubular slide members.

'7. A gauge including a base plate, a housing supporting said base plate, a xed jaw mounted on said base plate, said plate having a slot, a pair of slide members mounted below and parallel to said slot, a slider on each of said slides, a yoke connecting said sliders, a pair of arms on said yoke, a cylindrical post mounted on and extending below said plate Within said housing, a collar rotatively mounted on said post, a ring rotatively mounted on said collar, a dial secured to said collar, a dial secured to said ring, a pair of flexible members extending between said arms, a plurality of loops in one of said flexible members engaging said collar, means to secure a portion of one of said loops to said collar, a plurality of loops in the other of said flexible members engaging said ring, means to secure a portion of one of said second loops to said ring, the diameter of said first loops having an elemental ratio to the diameter of said second loops, and a second jaw positioned above said plate and having a portion thereof extending through said slot and secured to said yoke.

8. A gauge including a base, a xed jaw mounted on said base, a yoke member slidably mounted on said base, a pair of spaced arms on said yoke member, a post mounted on said base, a pair of dials mounted to rotate independently on said post, a collar on each dial, a pair of flexible members extending between said arms and looped about said collars, the diameter of one of said collars having an elemental ratio to the diameter of the other collar and a second body pivoted about the base and having a portion thereof secured to said yoke.

RALPH R. BOSTIC. 

